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https://www.theverge.com/2021/1/7/22212938/wifi-6e-rollout-starting-2021-smartphones-tvs-laptops-vr-routersCitarWi-Fi’s biggest upgrade in decades is starting to arriveWi-Fi 6E devices are now being certifiedWi-Fi is about to get a lot better. Many of this year’s new phones, laptops, TVs, routers, and more will come with support for Wi-Fi 6E, a new upgrade to Wi-Fi that’s essentially like expanding your wireless connection from a two-lane road to an eight-lane highway. It’s the biggest upgrade to Wi-Fi in 20 years, and connections should be faster and a lot more reliable because of it.
Wi-Fi’s biggest upgrade in decades is starting to arriveWi-Fi 6E devices are now being certifiedWi-Fi is about to get a lot better. Many of this year’s new phones, laptops, TVs, routers, and more will come with support for Wi-Fi 6E, a new upgrade to Wi-Fi that’s essentially like expanding your wireless connection from a two-lane road to an eight-lane highway. It’s the biggest upgrade to Wi-Fi in 20 years, and connections should be faster and a lot more reliable because of it.
Mapping TradeTech: Trade in the Fourth Industrial RevolutionTradeTech, or the set of technologies and innovations that enable trade to be more efficient, inclusive, and equitable, is fundamental to harnessing the innovations of the Fourth Industrial Revolution to support the public good. Yet the incorporation of technologies in trade could result in unintended consequences that should be addressed to ensure TradeTech works for all companies regardless of their size, and for all countries regardless of their level of development. This report aims to shed light on the landscape of emerging trade technologies and consider the opportunities and challenges for each, ranging from AI to IoT to 3D printing.
Así es el tren de levitación magnética chino que viajará a 800 km/hBradley Brownell / 2021-01-19Hazte a un lado, Hyperloop. Ya eras obsoleto antes de que fueras una idea soñada. Los trenes de levitación magnética son y significativamente menos costosos de producir, ya que no tienen que viajar dentro de un tubo de vacío. China está explorando vías para aumentar la velocidad de sus trenes maglev, ya que es un país muy grande y quiere mover a las personas de manera más eficiente. Mediante el uso de superconductores de alta temperatura, investigadores de la Universidad Jiaotong del suroeste de China probaron un prototipo en una pista de prueba a una velocidad de hasta 620 kilómetros por hora. La esperanza es que algún día alcance los 800 kilómetros por hora.El objetivo es viajar en tren entre Beijing y Shanghái en menos de 3 horas. Para poner el trayecto en contexto, son casi 1300 km y lleva más de 12 horas hacerlo en automóvil, o 2 horas volando.Al hacer circular nitrógeno líquido a través de las vías para sobreenfriar el campo magnético a -200 ºC, el tren se vuelve mucho más eficiente. También se dice que el coste de este proceso es 1/50 del coste de usar helio líquido, que se emplea tradicionalmente para una conductividad aún más fría de alrededor de -270 ºC. Aparentemente, este tren usa un imán estático muy fuerte que mantiene el tren en suspensión sin requerir más energía eléctrica, utilizando la conductividad solo para el movimiento hacia adelante, lo que lo hace más eficiente que los trenes de levitación magnética tradicionales.China ya tiene la red ferroviaria de alta velocidad más amplia. Abarca 37.000 kilómetros de vías. El primer tren de levitación magnética del país comenzó a operar en 2003. Los trenes más rápidos generalmente superan los 400 kilómetros por hora, y Japón opera algunos en pistas de prueba a más de 560 kilómetros por hora. Está previsto que el tren de la serie L0 de Tokio a Osaka funcione a 500 kilómetros por hora con pasajeros a bordo, aunque esta línea aún no se ha terminado.China unveils state-of-the-art maglev train prototype designed to travel at 620km/hLa prueba de 620 kilómetros por hora realizada en Chengdu ciertamente supera todo lo visto hasta ahora. Es probable que pasen al menos varios años antes de que el maglev superconductor SJU sea viable para el transporte comercial, pero es un gran paso en la dirección correcta.Recuerda eso cuando veas cápsulas de prueba del Hyperloop viajando a poco más de 160 kilómetros por hora. ¿Por qué perder el tiempo con un método peligroso y no probado cuando la tecnología actual ya es capaz de hacerlo casi cuatro veces más rápido?
Esa noticia es FAKE.
Los chinos aprenden demasiado rápido de los usos y costumbres occidentales
al hacer circular nitrógeno líquido a través de las vías para sobreenfriar el campo magnético a -200 ºC, el tren se vuelve mucho más eficiente.
"The HTS technology can make the train float without electricity, and it can be moved with just one hand," said Deng. At the site, a reporter succeeded in moving the 12-tonne levitated locomotive with one finger.
Esa noticia es FAKE.No obstante Cadavre te agradezco MUCHO el vídeo, ya lo había visto porque vengo de familia ferroviaria (abuelo, padre, tios, primos...) pero es tan falso como el hiperloop.¿Me puedo desahogar?La dinámica de la prensa ya es insoportable.En el propio vídeo se ve que es una propuesta de diseño. En la segunda parte del vídeo se ven los 5 módulos, 5 MÓDULOS de repulsión refrigerados con nitrógeno debajo del tren. No es que no se vean mas por la toma. Es que se ve que son solamente 5 módulos aislados en el suelo, que son los que se necesitan para mantener la maqueta en levitación.De hecho, si miramos a la derecha de la imagen vemos que la maqueta está en un final de via y no se mueve mas que los escasos centímetros que permiten esos 5 módulos.-en el segundo 36 del vídeo-Además que no se puede (se puede pero no es viable) mantener una red viaria con nitrógeno a -200ºC. Si todos los que estamos aqui somos de STEM no merece la pena perder ni un segundo en explicar porqué.Los chinos aprenden demasiado rápido de los usos y costumbres occidentales
German Institute Develops 'Powerpaste' That Stores Hydrogen Energy At 10x the Density of a Lithium BatteryPosted by BeauHD on Monday February 08, 2021 @09:10PM from the clean-energy dept.A German research organization has developed a magnesium-based "Powerpaste" with an energy density ten times more than current battery technology. Hackaday reports:CitarWe've been promised hydrogen-powered engines for some time now. One downside though is the need for hydrogen vehicles to have heavy high-pressure tanks. While a 700 bar tank and the accompanying fuel cell is acceptable for a city bus or a truck, it becomes problematic with smaller vehicles, especially ones such as scooters or even full-sized motorcycles. The Fraunhofer Institute wants to run smaller vehicles on magnesium hydride in a paste form that they call POWERPASTE.The idea is that the paste effectively stores hydrogen at normal temperature and pressure. At 250C, the paste decomposes and releases its hydrogen. While your motorcycle may seem hot when parked in the sun, it isn't getting quite to 250C. Interestingly, the paste only provides half the available hydrogen. The rest is from water added start a reaction to release the hydrogen. Fraunhofer claims the energy density available is greater than that of a 700 bar tank in a conventional hydrogen system and ten times more than current battery technology.One thing that's attractive is that the paste is easy to store and pump. A gas station, for example, could invest $20-30,000 and dispense the paste from a metal drum to meet low demand and then scale up as needed. A hydrogen pumping setup starts at about $1.2 million. Fraunhofer is building a pilot production plant that will produce about four tons of the material a year.
We've been promised hydrogen-powered engines for some time now. One downside though is the need for hydrogen vehicles to have heavy high-pressure tanks. While a 700 bar tank and the accompanying fuel cell is acceptable for a city bus or a truck, it becomes problematic with smaller vehicles, especially ones such as scooters or even full-sized motorcycles. The Fraunhofer Institute wants to run smaller vehicles on magnesium hydride in a paste form that they call POWERPASTE.The idea is that the paste effectively stores hydrogen at normal temperature and pressure. At 250C, the paste decomposes and releases its hydrogen. While your motorcycle may seem hot when parked in the sun, it isn't getting quite to 250C. Interestingly, the paste only provides half the available hydrogen. The rest is from water added start a reaction to release the hydrogen. Fraunhofer claims the energy density available is greater than that of a 700 bar tank in a conventional hydrogen system and ten times more than current battery technology.One thing that's attractive is that the paste is easy to store and pump. A gas station, for example, could invest $20-30,000 and dispense the paste from a metal drum to meet low demand and then scale up as needed. A hydrogen pumping setup starts at about $1.2 million. Fraunhofer is building a pilot production plant that will produce about four tons of the material a year.
Un artículo de nuestro querido Ambrose, del Telegraph. Normalmente los cuelgo en el hilo ppcc. Ni idea de si lo que habla tiene fundamento. Reconozco que el constante 'semos los mejores' es muy cargante, pero normalmente se curra los artículos. The possibilities for the UK’s net-zero drive are tantalisingIt may sound far-fetched, but research in Cumbria has found a way of creating power from radioisotopesAMBROSE EVANS-PRITCHARDhttps://www.telegraph.co.uk/business/2021/02/07/britains-energy-future-lies-little-box-tricks/Britain is the crucible where so many breakthroughs are happening, perhaps because the country never succumbed to the technology luddism of the precautionary principle, and perhaps because the grip of vested interests is relatively weak (the same thing).
Imagine a nuclear battery in a little box that uses decaying isotopes to generate cheap and clean electricity around the clock for decades with no combustion, fission, or noise. It just sits silently and emits constant power.
Scientists Develop Transparent Wood That Is Stronger, Lighter Than GlassPosted by BeauHD on Tuesday February 09, 2021 @05:00AM from the wood-you'd-rather-have dept.Researchers at the University of Maryland have turned ordinary sheets of wood into transparent material that is nearly as clear as glass, but stronger and with better insulating properties. It could become an energy efficient building material in the future. CBC.ca reports:CitarWood is made of two basic ingredients: cellulose, which are tiny fibres, and lignin, which bonds those fibres together to give it strength. Tear a paper towel in half and look closely along the edge. You will see the little cellulose fibres sticking up. Lignin is a glue-like material that bonds the fibres together, a little like the plastic resin in fibreglass or carbon fibre. The lignin also contains molecules called chromophores, which give the wood its brown colour and prevent light from passing through.Early attempts to make transparent wood involved removing the lignin, but this involved hazardous chemicals, high temperatures and a lot of time, making the product expensive and somewhat brittle. The new technique is so cheap and easy it could literally be done in a backyard. Starting with planks of wood a metre long and one millimetre thick, the scientists simply brushed on a solution of hydrogen peroxide using an ordinary paint brush. When left in the sun, or under a UV lamp for an hour or so, the peroxide bleached out the brown chromophores but left the lignin intact, so the wood turned white.Next, they infused the wood with a tough transparent epoxy designed for marine use, which filled in the spaces and pores in the wood and then hardened. This made the white wood transparent. You can see a similar effect by taking that same piece of paper towel, dip half of it in water and place it on a patterned surface. The white paper towel will become translucent with light passing through the water and cellulose fibres without being scattered by refraction. The epoxy in the wood does an even better job, allowing 90 per cent of visible light to pass through. The result is a long piece of what looks like glass, with the strength and flexibility of wood.The findings have been published in the journal Science Advances.
Wood is made of two basic ingredients: cellulose, which are tiny fibres, and lignin, which bonds those fibres together to give it strength. Tear a paper towel in half and look closely along the edge. You will see the little cellulose fibres sticking up. Lignin is a glue-like material that bonds the fibres together, a little like the plastic resin in fibreglass or carbon fibre. The lignin also contains molecules called chromophores, which give the wood its brown colour and prevent light from passing through.Early attempts to make transparent wood involved removing the lignin, but this involved hazardous chemicals, high temperatures and a lot of time, making the product expensive and somewhat brittle. The new technique is so cheap and easy it could literally be done in a backyard. Starting with planks of wood a metre long and one millimetre thick, the scientists simply brushed on a solution of hydrogen peroxide using an ordinary paint brush. When left in the sun, or under a UV lamp for an hour or so, the peroxide bleached out the brown chromophores but left the lignin intact, so the wood turned white.Next, they infused the wood with a tough transparent epoxy designed for marine use, which filled in the spaces and pores in the wood and then hardened. This made the white wood transparent. You can see a similar effect by taking that same piece of paper towel, dip half of it in water and place it on a patterned surface. The white paper towel will become translucent with light passing through the water and cellulose fibres without being scattered by refraction. The epoxy in the wood does an even better job, allowing 90 per cent of visible light to pass through. The result is a long piece of what looks like glass, with the strength and flexibility of wood.